/*
. -= magicscroll v0.5 =- 2002-01-09                             .
. (c) 2001 magicsquare s.a. - http://magicsquare.be              .
. webmaster@magicsquare.be for usage instructions/authorizations .
*/

// init some variables
var h = 0;
var w = 0;
var switchoff = 0;
var last_offset = 0;
var percent = 0;

browser = navigator.appName;

document.layers ? thisbrowser="NN4" : thisbrowser="IE";
if (thisbrowser == "IE" && browser == "Netscape") thisbrowser = "MOZ";

initscroll()

function magicscroll()
	{
	if (thisbrowser=="NN4")
		{
		w1 = eval("window.innerWidth");
		h1 = eval("window.innerHeight");
		menuwidth = eval("document.bdmenu.clip.width");
		menuheight = eval("document.bdmenu.clip.height");
		scrollbarminus = 8;
		menu = eval("document.bdmenu");
		offset = eval("window.pageYOffset");
		}
	else if (thisbrowser=="MOZ")
		{
		w1 = eval("window.innerWidth");
		h1 = eval("window.innerHeight");
		menuwidth = eval("document.getElementById('bdmenu').offsetWidth");
		menuheight = eval("document.getElementById('bdmenu').offsetHeight");
		scrollbarminus = 8;
		menu = eval("document.getElementById('bdmenu').style");
		offset = eval("window.pageYOffset");
		//alert(offset);
		}
	else
		{
		w1 = eval("document.body.clientWidth");
		h1 = eval("document.body.clientHeight");
		menuwidth = eval("bdmenu.offsetWidth");
		menuheight = eval("bdmenu.offsetHeight");
		scrollbarminus = 0;
		menu = eval("bdmenu.style");
		offset = eval("document.body.scrollTop");
		}


	h2 = offset;

	// variables pour resize
		w = 5; //642;
		h = 16; //265;
	// reposition layer
	if (((offset-last_offset) > 1 || (offset-last_offset) < 1))
		{
		percent = (offset - last_offset)/10;
		if (percent > 0) {percent = Math.ceil(percent);} else {percent = Math.floor(percent);}

		menu.top = last_offset + h;
		menu.left = w;
		}
	else
		{
		menu.top = h + offset;
		menu.left = w;
		}

	last_offset = last_offset + percent;
	}

function initscroll()
	{
	if (thisbrowser=="NN4")
		{
		w1 = eval("window.innerWidth");
		h1 = eval("window.innerHeight");
		menuwidth = eval("document.bdmenu.clip.width");
		menuheight = eval("document.bdmenu.clip.height");
		scrollbarminus = 8;
		menu = eval("document.bdmenu");
		offset = eval("window.pageYOffset");
		}
	else if (thisbrowser=="MOZ")
		{
		w1 = eval("window.innerWidth");
		h1 = eval("window.innerHeight");
		menuwidth = eval("document.getElementById('bdmenu').offsetWidth");
		menuheight = eval("document.getElementById('bdmenu').offsetHeight");
		scrollbarminus = 8;
		menu = eval("document.getElementById('bdmenu').style");
		offset = eval("window.pageYOffset");
		}
	else
		{
		w1 = eval("document.body.clientWidth");
		h1 = eval("document.body.clientHeight");
		menuwidth = eval("document.getElementById('bdmenu').offsetWidth");
		menuheight = eval("document.getElementById('bdmenu').offsetHeight");
		scrollbarminus = 0;
		menu = eval("document.getElementById('bdmenu').style");
		offset = eval("document.body.scrollTop");
		}

	// variables
		w = 5; //(w1/2) - (770/2) + 642 - scrollbarminus;
		h = 26; //5;
	menu.top = h + offset;
	menu.left = w;
	}

// update page offset
intervaltime = (thisbrowser != "MOZ") ? 16 : 32;
setInterval("magicscroll()",intervaltime);